using System;



namespace Org.BouncyCastle.Bcpg.Sig
{
	/**
	* packet giving signature creation time.
	*/
	public class IssuerKeyId
		: SignatureSubpacket
	{
		protected static byte[] KeyIdToBytes(
			long    keyId)
		{
			byte[]    data = new byte[8];

			data[0] = (byte)(keyId >> 56);
			data[1] = (byte)(keyId >> 48);
			data[2] = (byte)(keyId >> 40);
			data[3] = (byte)(keyId >> 32);
			data[4] = (byte)(keyId >> 24);
			data[5] = (byte)(keyId >> 16);
			data[6] = (byte)(keyId >> 8);
			data[7] = (byte)keyId;

			return data;
		}

		public IssuerKeyId(
			bool    critical,
			byte[]     data)
			: base(SignatureSubpacketTag.IssuerKeyId, critical, data)
		{
		}

		public IssuerKeyId(
			bool    critical,
			long       keyId)
			: base(SignatureSubpacketTag.IssuerKeyId, critical, KeyIdToBytes(keyId))
		{
		}

		public long KeyId
		{
			get
			{
				long keyId = ((long)(data[0] & 0xff) << 56)
					| ((long)(data[1] & 0xff) << 48)
					| ((long)(data[2] & 0xff) << 40)
					| ((long)(data[3] & 0xff) << 32)
					| ((long)(data[4] & 0xff) << 24)
					| ((long)(data[5] & 0xff) << 16)
					| ((long)(data[6] & 0xff) << 8)
					| ((long)data[7] & 0xff);

				return keyId;
			}
		}
	}
}
